Øvingsoppgaver med fasit

Regn ut:

$$\begin{gathered} 200-351 \\ 278-400 \\ 64-350 \end{gathered}$$

Regn i hodet:

$$\begin{gathered} 7000-812 \\ 264-169 \\ 357-219 \end{gathered}$$

Still opp og regn ut:

$$\begin{gathered} 1785,342-169,27 \\ 4489,5-12,594 \\ 681,33-24,975 \end{gathered}$$

Regn ut:

$$\begin{gathered} 14-163 \\ 25-97 \\ 117-150 \end{gathered}$$

Still opp og finn sifrene som mangler:

$$\begin{gathered} \mathrm{...5...1...}-\mathrm{3...8...1}=7298 \\ \mathrm{5...1...9}-\mathrm{...8...3...}=23394 \end{gathered}$$

Regn ut:

$$\begin{gathered} 36-59 \\ 86-134 \\ 27-98 \end{gathered}$$

Still opp og regn ut:

$$\begin{gathered} 487,6-24,397 \\ 1000-65,355 \\ 145,2-3,9992 \end{gathered}$$

Still opp og finn sifrene som mangler:

$$\begin{gathered} \mathrm{...0...2...}-\mathrm{1...7...3}=342 \\ \mathrm{3...1...1}-\mathrm{...8...5...}=12412 \end{gathered}$$

Regn ut:

$$\begin{gathered} 1,5-2,4 \\ 3,6-5,0 \\ 0,1-2,8 \end{gathered}$$

Regn i hodet:

$$\begin{gathered} 400-127 \\ 3000-2185 \\ 10000-2470 \end{gathered}$$